WPS and WID

1. what is service

1.1 services are defined by explicit, implementation-independent interfaces

1.2 loosely coupled communication protocols

1.3 reusable business logic

 

2. SOA

2.1 SDO, data exchanged between services

     

       SDO supports a disconnected programming patterns(like JDBC Cached Rowset)

     

       get/set properties from DataObject directly

DataObject customer = …
customer.setString("firstName","John");
customer.setString("lastName","Doe");
customer.setInt("customerID", 123);
int id = customer.getInt(“customerID”);

 

       Data Graph & Change Summary interfaces

 

 

2.2 SCA,a mechanism  for invoking services

 

SCA Component: Interface(Java or WSDL Port Type), Reference(Java or WSDL Port Type), Implementation(Java, BEPL,State Machine, Business Rule, Human Task,Selector)

 

 

2.3 BPEL,compose services into a larger integrated business app

 

    Business Processes execute in Business Flow Manager